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diff --git a/Bindings/mfd/nxp,bbnsm.yaml b/Bindings/mfd/nxp,bbnsm.yaml
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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/nxp,bbnsm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP Battery-Backed Non-Secure Module
+
+maintainers:
+ - Jacky Bai <ping.bai@nxp.com>
+
+description: |
+ NXP BBNSM serves as non-volatile logic and storage for the system.
+ it Intergrates RTC & ON/OFF control.
+ The RTC can retain its state and continues counting even when the
+ main chip is power down. A time alarm is generated once the most
+ significant 32 bits of the real-time counter match the value in the
+ Time Alarm register.
+ The ON/OFF logic inside the BBNSM allows for connecting directly to
+ a PMIC or other voltage regulator device. both smart PMIC mode and
+ Dumb PMIC mode supported.
+
+properties:
+ compatible:
+ items:
+ - enum:
+ - nxp,imx93-bbnsm
+ - const: syscon
+ - const: simple-mfd
+
+ reg:
+ maxItems: 1
+
+ rtc:
+ type: object
+ $ref: /schemas/rtc/rtc.yaml#
+
+ properties:
+ compatible:
+ enum:
+ - nxp,imx93-bbnsm-rtc
+
+ interrupts:
+ maxItems: 1
+
+ start-year: true
+
+ required:
+ - compatible
+ - interrupts
+
+ additionalProperties: false
+
+ pwrkey:
+ type: object
+ $ref: /schemas/input/input.yaml#
+
+ properties:
+ compatible:
+ enum:
+ - nxp,imx93-bbnsm-pwrkey
+
+ interrupts:
+ maxItems: 1
+
+ linux,code: true
+
+ required:
+ - compatible
+ - interrupts
+
+ additionalProperties: false
+
+required:
+ - compatible
+ - reg
+ - rtc
+ - pwrkey
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/input/linux-event-codes.h>
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ bbnsm: bbnsm@44440000 {
+ compatible = "nxp,imx93-bbnsm", "syscon", "simple-mfd";
+ reg = <0x44440000 0x10000>;
+
+ bbnsm_rtc: rtc {
+ compatible = "nxp,imx93-bbnsm-rtc";
+ interrupts = <GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH>;
+ };
+
+ bbnsm_pwrkey: pwrkey {
+ compatible = "nxp,imx93-bbnsm-pwrkey";
+ interrupts = <GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH>;
+ linux,code = <KEY_POWER>;
+ };
+ };